Abstract: In order to reduce the number of welding defects and repair of unqualified products and reduce the production cost, this paper studies the optimization method of welding process of thin galvanized sheet, and analyzes the causes of welding seam burn through, edge bite, porosity, arc pit and other deformation defects in robot welding of galvanized sheet. Puts forward the optimized welding procedure, parts assembled clearance, drop transfer mode, position welding, welding speed and welding posture, ship type choose backward of welding methods, prevention measures, such as reverse deformation effectively control results show that the welding defects, weld a qualified rate of 95% or more, greatly reduces the cost of repair, is of great significance.

Key words: Robot welding; Welding defects; Galvanized sheet

摘要： 为了减少焊接缺陷以及不合格品返修的次数，从而降低生产成本，文章研究了薄板镀锌板 焊接工艺的优化方法，分析了镀锌板机器人焊接中焊缝烧穿、咬边、气孔、弧坑等变形缺陷产生 原因，提出了优化焊接程序、零件组合间隙、熔滴过渡方式、焊接姿态、船型位置焊接、焊接速 度及选用后倾焊接方法、反变形等预防措施，结果显示焊接缺陷得到有效控制，焊缝一次合格率 达到 95%以上，大幅降低了返修成本，具有重大意义。

关键词: 机器人焊接；焊接缺陷；镀锌板